package com.catering.until;

import java.sql.Timestamp;
import java.util.*;

public class DateUtils {
    // 获取当天的开始时间
    public static Date getDayBegin() {
    Calendar cal = new GregorianCalendar();
    cal.set(Calendar.HOUR_OF_DAY, 0);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);
    return cal.getTime();
    }

    // 获取当天的结束时间
    public static Date getDayEnd() {
    Calendar cal = new GregorianCalendar();
    cal.set(Calendar.HOUR_OF_DAY, 23);
    cal.set(Calendar.MINUTE, 59);
    cal.set(Calendar.SECOND, 59);
    return cal.getTime();
    }

    // 获取昨天的开始时间
    public static Date getBeginDayOfYesterday() {
    Calendar cal = new GregorianCalendar();
    cal.setTime(getDayBegin());
    cal.add(Calendar.DAY_OF_MONTH, -1);
    return cal.getTime();
    }

    // 获取昨天的结束时间
    public static Date getEndDayOfYesterDay() {
    Calendar cal = new GregorianCalendar();
    cal.setTime(getDayEnd());
    cal.add(Calendar.DAY_OF_MONTH, -1);
    return cal.getTime();
    }

    // 获取明天的开始时间
    public static Date getBeginDayOfTomorrow() {
    Calendar cal = new GregorianCalendar();
    cal.setTime(getDayBegin());
    cal.add(Calendar.DAY_OF_MONTH, 1);

    return cal.getTime();
    }

    // 获取明天的结束时间
    public static Date getEndDayOfTomorrow() {
	    Calendar cal = new GregorianCalendar();
	    cal.setTime(getDayEnd());
	    cal.add(Calendar.DAY_OF_MONTH, 1);
	    return cal.getTime();
    }

    // 获取本周的开始时间
    public static Date getBeginDayOfWeek() {
	    Date date = new Date();
	    Calendar cal = Calendar.getInstance();
	    cal.setTime(date);
	    int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
	    if (dayofweek == 1) {
	        dayofweek += 7;
	    }
	    cal.add(Calendar.DATE, 2 - dayofweek);
	    return getDayStartTime(cal.getTime());
    }

    // 获取本周的结束时间
    public static Date getEndDayOfWeek() {
	    Calendar cal = Calendar.getInstance();
	    cal.setTime(getBeginDayOfWeek());
	    cal.add(Calendar.DAY_OF_WEEK, 6);
	    Date weekEndSta = cal.getTime();
	    return getDayEndTime(weekEndSta);
    }

    // 获取本月的开始时间
    public static Date getBeginDayOfMonth() {
	    Calendar calendar = Calendar.getInstance();
	    calendar.set(getNowYear(), getNowMonth() - 1, 1);
	    return getDayStartTime(calendar.getTime());
    }

    // 获取本月的结束时间
    public static Date getEndDayOfMonth() {
	    Calendar calendar = Calendar.getInstance();
	    calendar.set(getNowYear(), getNowMonth() - 1, 1);
	    int day = calendar.getActualMaximum(5);
	    calendar.set(getNowYear(), getNowMonth() - 1, day);
	    return getDayEndTime(calendar.getTime());
    }

    // 获取上个月的开始时间
    public static Date getBeginDayOfLastMonth() {
	    Date date = new Date();
	    Calendar calendar = Calendar.getInstance();
	    calendar.setTime(date);
	    calendar.add(calendar.MONTH, -1);
	    calendar.set(calendar.DAY_OF_MONTH, 1);
	    return getDayStartTime(calendar.getTime());
    }

    // 获取上个月的结束时间
    public static Date getEndDayOfLastMonth() {
	    Date date = new Date();
	    Calendar calendar = Calendar.getInstance();
	    calendar.setTime(date);
	    calendar.add(calendar.MONTH, -1);
	    int day = calendar.getActualMaximum(5);
	    calendar.set(calendar.DAY_OF_MONTH, day);
	    return getDayEndTime(calendar.getTime());
    }

    // 获取本年的开始时间
    public static Date getBeginDayOfYear() {
	    Calendar cal = Calendar.getInstance();
	    cal.set(Calendar.YEAR, getNowYear());
	    // cal.set
	    cal.set(Calendar.MONTH, Calendar.JANUARY);
	    cal.set(Calendar.DATE, 1);
	
	    return getDayStartTime(cal.getTime());
    }

    // 获取本年的结束时间
    public static Date getEndDayOfYear() {
	    Calendar cal = Calendar.getInstance();
	    cal.set(Calendar.YEAR, getNowYear());
	    cal.set(Calendar.MONTH, Calendar.DECEMBER);
	    cal.set(Calendar.DATE, 31);
	    return getDayEndTime(cal.getTime());
    }

    // 获取某个日期的开始时间
    public static Timestamp getDayStartTime(Date d) {
	    Calendar calendar = Calendar.getInstance();
	    if (null != d)
	        calendar.setTime(d);
	    calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), 0,
	        0, 0);
	    calendar.set(Calendar.MILLISECOND, 0);
	    return new Timestamp(calendar.getTimeInMillis());
    }

    // 获取某个日期的结束时间
    public static Timestamp getDayEndTime(Date d) {
	    Calendar calendar = Calendar.getInstance();
	    if (null != d)
	        calendar.setTime(d);
	    calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), 23,
	        59, 59);
	    calendar.set(Calendar.MILLISECOND, 999);
	    return new Timestamp(calendar.getTimeInMillis());
    }

    // 获取今年是哪一年
    public static Integer getNowYear() {
	    Date date = new Date();
	    GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
	    gc.setTime(date);
	    return Integer.valueOf(gc.get(1));
    }

    // 获取本月是哪一月
    public static int getNowMonth() {
	    Date date = new Date();
	    GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
	    gc.setTime(date);
	    return gc.get(2) + 1;
    }

    // 两个日期相减得到的天数
    public static int getDiffDays(Date beginDate, Date endDate) {
	    if (beginDate == null || endDate == null) {
	        throw new IllegalArgumentException("getDiffDays param is null!");
	    }
	
	    long diff = (endDate.getTime() - beginDate.getTime()) / (1000 * 60 * 60 * 24);
	
	    int days = new Long(diff).intValue();
	
	    return days;
    }

    // 两个日期相减得到的毫秒数
    public static long dateDiff(Date beginDate, Date endDate) {
	    long date1ms = beginDate.getTime();
	    long date2ms = endDate.getTime();
	    return date2ms - date1ms;
    }

    // 获取两个日期中的最大日期
    public static Date max(Date beginDate, Date endDate) {
	    if (beginDate == null) {
	        return endDate;
	    }
	    if (endDate == null) {
	        return beginDate;
	    }
	    if (beginDate.after(endDate)) {
	        return beginDate;
	    }
	    return endDate;
    }

    // 获取两个日期中的最小日期
    public static Date min(Date beginDate, Date endDate) {
	    if (beginDate == null) {
	        return endDate;
	    }
	    if (endDate == null) {
	        return beginDate;
	    }
	    if (beginDate.after(endDate)) {
	        return endDate;
	    }
	    return beginDate;
    }

    // 返回某月该季度的第一个月
    public static Date getFirstSeasonDate(Date date) {
	    final int[] SEASON = { 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4 };
	    Calendar cal = Calendar.getInstance();
	    cal.setTime(date);
	    int sean = SEASON[cal.get(Calendar.MONTH)];
	    cal.set(Calendar.MONTH, sean * 3 - 3);
	    return cal.getTime();
    }

    // 返回某个日期下几天的日期
    public static Date getNextDay(Date date, int i) {
	    Calendar cal = new GregorianCalendar();
	    cal.setTime(date);
	    cal.set(Calendar.DATE, cal.get(Calendar.DATE) + i);
	    return cal.getTime();
    }

    // 返回某个日期前几天的日期
    public static Date getFrontDay(Date date, int i) {
	    Calendar cal = new GregorianCalendar();
	    cal.setTime(date);
	    cal.set(Calendar.DATE, cal.get(Calendar.DATE) - i);
	    return cal.getTime();
    }

    // 获取某年某月到某年某月按天的切片日期集合（间隔天数的日期集合）
    public static List getTimeList(int beginYear, int beginMonth, int endYear, int endMonth, int k) {
	    List list = new ArrayList();
	    if (beginYear == endYear) {
	        for (int j = beginMonth; j <= endMonth; j++) {
	        list.add(getTimeList(beginYear, j, k));
	
	        }
	    } else {
	        {
	        for (int j = beginMonth; j < 12; j++) {
	            list.add(getTimeList(beginYear, j, k));
	        }
	
	        for (int i = beginYear + 1; i < endYear; i++) {
	            for (int j = 0; j < 12; j++) {
	            list.add(getTimeList(i, j, k));
	            }
	        }
	        for (int j = 0; j <= endMonth; j++) {
	            list.add(getTimeList(endYear, j, k));
	        }
	        }
	    }
	    return list;
    }

    // 获取某年某月按天切片日期集合（某个月间隔多少天的日期集合）
    public static List getTimeList(int beginYear, int beginMonth, int k) {
	    List list = new ArrayList();
	    Calendar begincal = new GregorianCalendar(beginYear, beginMonth, 1);
	    int max = begincal.getActualMaximum(Calendar.DATE);
	    for (int i = 1; i < max; i = i + k) {
	        list.add(begincal.getTime());
	        begincal.add(Calendar.DATE, k);
	    }
	    begincal = new GregorianCalendar(beginYear, beginMonth, max);
	    list.add(begincal.getTime());
	    return list;
    }

    // 获取某年某月的第一天日期
    public static Date getStartMonthDate(int year, int month) {
	    Calendar calendar = Calendar.getInstance();
	    calendar.set(year, month - 1, 1);
	    return calendar.getTime();
    }

    // 获取某年某月的最后一天日期
    public static Date getEndMonthDate(int year, int month) {
	    Calendar calendar = Calendar.getInstance();
	    calendar.set(year, month - 1, 1);
	    int day = calendar.getActualMaximum(5);
	    calendar.set(year, month - 1, day);
	    return calendar.getTime();
    }
}
